An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score

摘要: Background: The Migraine Disability Assessment (MIDAS) instrument is a five-item questionnaire developed to measure headache-related disability and improve doctor-patient communication about the functional consequences of migraine. Objectives: To examine test-retest reliability internal consistency five items overall MIDAS score in population-based samples migraine sufferers two countries compare across countries. Methods: Using clinically validated telephone interview, migraine-headache were identified United States (Baltimore, MD) Kingdom (Merton Sutton, Surrey). Eligible individuals completed on occasions an average 3 weeks apart. derived from questions missed time work household (one question each days with at least 50% reduced productivity) nonwork activities. Results: A total 97 100 twice. Mean median item values scores similar between Kingdom. Test-retest Spearman correlations individual ranged 0.46 0.78. No significant differences item-specific observed Pearson correlation (i.e., sum lost reduced-effectiveness domain) was 0.80 0.83 Cronbach α, consistency, 0.76 0.73 Conclusions: This first international study assess disability-related illness severity for are that previous (Headache Impact Questionnaire). However, requires fewer questions, easier score, provides intuitively meaningful information activity three domains.